Hi there,
It is a Baccarat concentric from the second half of the 20th century (soon after Baccarat restarted the production of - modern - paperweights). In view of the fact that it has the Baccarat acid mark but no edition number or signature cane in the set up (at least I cannot see one in the outer ring of canes), I think it is a 1960s weight (I am afraid it is not possible to be more precise).
While we do not do values on this board, these 1960s weights are not particularly rare and are sold regularly on Ebay. A search there will give you an idea of value/price.
I like the cheerful colour of those early weights, a nice find.
SophieB